poison

The story

1. Latin · derived frompōtiōnem“drink, a draught, a poisonous draught, a potion”
2. Old French · derived frompoison
3. Middle English · inherited frompoysoun
4. English todaypoison

From Middle English poysoun, poyson, pusoun, from Old French poison, poisun, from Latin pōtiōnem (“drink, a draught, a poisonous draught, a potion”), from pōtō (“to drink”). See also potion and potable (from the same root). Mostly displaced native Old English ātor and lybb. See more at atter.